Ni70Cr30 Heating Wire - Austenitic Nickel-Chromium Alloy for Heating Tubes Up to 1250°C
Price:
Negotiable
MOQ:
5
Delivery Time:
7-20 days
Brand:
DLX
Product Description
Nichrome Wire Ni70Cr30 Heating Spiral Wire For Heating Element
Ni70Cr30 is an austenitic nickel-chromium alloy suitable for temperature applications up to 1250°C. High chromium content (30% in average) provides excellent durability, especially in furnace applications.
Key Characteristics
- High resistivity for efficient heating
- Superior oxidation resistance
- Maintains good ductility after use
- Excellent weldability
- Resistant to "green rot" corrosion
- Performs well in both reducing and oxidizing atmospheres
Applications
Electric Heating Devices
Widely used in air heaters, electric furnaces, water heaters, and other electric heating devices due to stable heating performance and long service life.
Heating Tubes
Commonly formed into heating tubes for liquid and gas heating applications in heaters, water heaters, and steam generators.
Household Appliances
Used in ovens and microwaves for uniform and rapid heating elements.
Heating Pads and Blankets
Essential component in therapeutic heating pads and electric blankets for warmth and therapy applications.
Automotive Heating
Used in car seat heaters to provide comfortable heating for drivers and passengers.
Nickel-Chromium Alloy Performance Comparison
| Performance material | Cr10Ni90 | Cr20Ni80 | Cr30Ni70 | Cr15Ni60 | Cr20Ni35 | Cr20Ni30 |
|---|---|---|---|---|---|---|
| Composition Ni | 90 | Rest | Rest | 55.0～61.0 | 34.0～37.0 | 30.0～34.0 |
| Cr | 10 | 20.0～23.0 | 28.0～31.0 | 15.0～18.0 | 18.0～21.0 | 18.0～21.0 |
| Fe | -- | ≤1.0 | ≤1.0 | Rest | Rest | Rest |
| Maximum temperature℃ | 1300 | 1200 | 1250 | 1150 | 1100 | 1100 |
| Melting point ℃ | 1400 | 1400 | 1380 | 1390 | 1390 | 1390 |
| Density g/cm3 | 8.7 | 8.4 | 8.1 | 8.2 | 7.9 | 7.9 |
| Resistivity μΩ·m,20℃ | -- | 1.09±0.05 | 1.18±0.05 | 1.12±0.05 | 1.00±0.05 | 1.04±0.05 |
| Elongation at rupture | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 |
| Specific heat J/g.℃ | -- | 0.44 | 0.461 | 0.494 | 0.5 | 0.5 |
| Thermal conductivity KJ/m.h℃ | -- | 60.3 | 45.2 | 45.2 | 43.8 | 43.8 |
| Coefficient of lines expansion a*10-6/(20～1000℃) | -- | 18 | 17 | 17 | 19 | 19 |
| Micrographic structure | -- | Austenite | Austenite | Austenite | Austenite | Austenite |
| Magnetic properties | -- | Nonmagnetic | Nonmagnetic | Nonmagnetic | Weak magnetic | Weak magnetic |
Available Forms and Sizes
| Size Range | Image |
|---|---|
| Wire dia 0.03-7.5mm |  |
| dia 8.0-12.0mm |  |
| Ribbon (0.05-0.35)*(0.5-6.0)mm |  |
| Strip (0.50-2.5)*(5-180)mm |  |
| Rod 8-50mm |  |
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Changzhou DLX Alloy Co., Ltd.
Location
NO.32 West Taihu Road, Xinbei District, Changzhou, Jiangsu
Contact Person
Jane